Maybe because he was deaf in left ear and had the earphone on in the right one that he didn't hear people shouting at him about the truck losing control on the road while he was crossing.

He was crossing with his eyes on the phone and earphones on full volume, bag slinged on one shoulder, until someone crashed into him causing them to go fall on the sidewalk, he looked up in shock and surprised before the truck collided with the pole. People surrounded them.

".. W-what.. Happened..?"